"This Powerblanket heated blanket is designed to keep 420-lb. liquid propane and other gas cylinder tanks at their optimal temperatures to maintain optimal pressure, enhance performance and increase efficiency. U.S.A. Amps 4.5, Capacity 1 Cylinder, Closure Type Strap and buckle, Common Usage Keep gas cylinders at optimal temperature, Compatible With 420 Lb. Cylinders, Cylinders qty. 1 420 Lb. cylinder, Dimensions L x W in. 53 x 104, Finish Type Vinyl outer shell, Plug Type 3-prong, Power Cord ft. 6, Receptacle Type Required Standard, Thermal Cutoff Safety Device Yes, Thermostat Included Yes, Volts 120V, Watts 548, Temperature Range F 80-90 10F."